A 17-year-old student has experienced reversible, periodic attacks of chest tightness with coughing, wheezing, and hyperpnea. She states that expiration is more difficult than inspiration. She is most comfortable sitting forward with arms leaning on some support. X-rays revealed mild overinflation of the chest. Results from laboratory and pulmonary function tests are as follows: Frequency 20 breaths/min Vital capacity (VC) 2.9 L FEV1.0 1.4 L FEV1.0/FVC 56% Functional residual capacity (FRC) 3.89 L Total lung capacity (TLC) 6.82 L PaO2 70 mm Hg PaCO2 26 mm Hg Pulse 108 b/min BP 120/76 mm Hg Intermittent use of a bronchial smooth muscle dilator (1:1000 epinephrine by nebulizer) for several days caused marked improvement, resulting in the following laboratory and pulmonary function tests: VC 4.15 L FEV1.0 3.1 L FEV1.0/FVC >75% FRC 3.7 L TLC 5.96L PaO2 89 mm Hg PaCO2 38 mm Hg Pulse 129 b/mi BP 122/78 mm Hg What is the disorder of this 17-year-old student? Is this primarily a restrictive or an obstructive disorder? Why? Write the formula for determining residual volume (RV). Determine the residual volume (RV) before and after the use of the bronchodilator (3.0 points). RV before using the bronchodilator: RV after using the bronchodilator: Why is expiration more difficult than inspiration in this person? Why does the bronchodilator exaggerate the tachycardia? What causes the hypoxemia and the hypocapnemia in this person? A beta2-adrenergic agent was prescribed for further use because it has less cardiostimulatory (beta1) effect. Based on your knowledge of beta1 and beta2 receptors, why is this a good suggestion? An anticholinergic agent was also suggested as a possible nebulizer agent. How might this help the breathing problem? What Awaits you: On-time delivery guarantee Masters and PhD-level writers Automatic plagiarism check 100% Privacy and Confidentiality High Quality custom-written papers
Use the order calculator below and get started! Contact our live support team for any assistance or inquiry.
[order_calculator]